Muffler for autos.



W. REETZ.

MUFFLER FOR AUTOS.

APPLICATION FILED SEPT. 25, 1913.

1,109,702. Patented Sept. 8, 1914.

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' 15 View. of mufiler, one

J bnhof-thefen', j 20.n quntingfthe blades position; Fig. t is a 25 (The operating parts are withina' casing formed of the two parts 1' *3 afldclamp the members 1 and t. in

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' REETZ, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNIVERSAL AUTO SUPPLY MANUFACTURlNG COMPANY, OF CHICAGO, ILLINOIS.

MUFFLER AUTOS.

, Specificationof Letters Patent.

' Patented Application filed Sentember '35, 1913. Serial No. 791,64.

i 1 provide -a, mufiier for explosive engines by .10 which the-successive bodies or volumes of" air or heated gases delivered from the engine, are emitted from the mufder ina practically continuous stream.

In the drawings,

hers being removed; Fig, 2-is an elevation taken at rig-htangles-tothe View of Fig; Fig, '3 a 'detailed ,sectionaY-view or the showing the arrangement for filmiloif topiFig. 3, the inemhers which clamp the blades in Position being removed; anda'F g-fi'is agdetailcf Fig, 4, looking to-. wardlthe'left {Tom the line 55, i ig; &.

Y held or retained nd -.2,;;wbiehj,members areboth ovided" witheare l perforated at 4, bolt. 0 being to :pass through the p orations together. At the left end;, the casing is termed with Ean enlargement 'dwithin which the fan 7 is received. "Said fan is carried upon the shaft 18, whichshaft is journaled-in one of the casing members,--1The blades of'the tan "are narrower at ,the. ends than they are near 1the huh, said wider-portions of'the blades bingdes'ignzited- 9. Upon the shaft 8 the screw. 10 is secured, said screw being toward 10% the right Qftheenlargement v'5 and at a point ;.whe1"ie1 .:;-the! casing iscylindri'cal in shape. fyheieshanst pipe 11 from the engine enters the enlargement-6 near the bottom, Fig. 2,

iand'the conduit "12' connects .theinterior of ntl1'e; rem-b1- cavity .l w'within which the .-blades of the fanare adapted to move to that cylindrical partjo'r section 14.01? the casing within; which the screw 10 is received. .;A.s theheated and escaping gases fromthe 5e-engine pass through the pipe 11, traveling Figure l'is an interior of the casing mem 5 have reached the right end, the action of in the direction of the arrows, the gases will strike the blades 7' of the fan, thus causing the fan to revolve. As the fan revolves, being obvious that its revolution is caused by the. pressure of the exhausting gases, the gases will pass around in therecess 13 until they reach the conduit 12, it being understood that the gases must travel through about 270 degrees of arc in passing from the discharge end of conduit 11 to the receiving end of conduit 12. After the gases have sed through the conduit 12 and into that will thus be somewhat further checked by the screw 10, and by the time that the gases the fan-blades 1" and the threads of the screw i 10 will have been such as to have converted the successive bodies or" gases which entered the conduit 11, into, continuously flowing stream which esc e discharge end on the right,

As previou lv ement 6 is sha t... a shape of the fa 111g wider near t1. it, than it is at the es,

As best sl we Fig; 2, the gas, the engine fi engage the blades of neartbeir r ends where the relatively narrow and there act upon the fan so as to cause rotation of the same and of the shaft 8 upon which the fan is secured, but when the gases reach the enlarged part or section 15 ofthe opening 13, said gases expand in volume, and this expansion tends to create; draft or suction which assists in the removal of the gases from the engine. Y'Vere the fan to be positively driven from a'suit' able source of power, the fan itself would create the suction, but since the fan in this invention is driven by the escaping gases, the desired suction is due to the provision of the enlarged recess 16. I

It would be possible to construct the fan of a single integral casting, but it is preferable tor-many reasons to make same'of .a

to conform cess or can as indicated plurality of parts assembled together.- The hart of: the casing designated 14, the gases -within the recesses 18 hub 10 which encircles the left end of the shaft 8 is a cylindrical member provided with slots or recesses 17. The inner ends of the blades 7 are formed, as best shown in Fig. 3, with the recesses 18 upon each side, said recesses 18 being wedge-shaped so as to receive the heading 19 upon the caps 20. The two caps 20 one of which is shown detached from'the hublfi in Fig. 4 and attached thereto in Fig. 3, clamp the blades in lace when in the position of F i 3, and because of the reception of the eads l9 firmly in place. The shaft itself is journaled in supports'secured to the casing 1., .N ear one end is the block or journal 22, and at the opposite end .is thejournal 23 hollowed out at 24so as-to receivirthe projecting end of the shaft 8. At its right end, the casing carries the funnel or' delivery device 25 (shown conventionally), and the pipe 26 through which the gases pass into the atmosphere may be in any desired position or lead toany desired exit 'An additional bearing for the shaft 8 arises from the fact that the casing members are grooved at 27.

' From Fig. lr'of the drawings it will be seen that the conduit 11, through which the gases from the engine pass, is provided with a bend or elbow 28. The not enter the chamber within which the fan rotates in ,a line parallel to the axis of thefan, but are directed at such an angle to the axis as to strike passed'into the fan the blades perpendicularly. ,Because of thisconstruction,-the fan will be driven with a greater degree of certainty and at a gre'ater speed than would be the case, if'the exhaust ases from the engine chamber parallel to the axis of the shaft 8.

It will be obvious that many changes in v the details of construction and arrangement fan mounted, sa1d of parts may be made without departing .from the scope of the invention.

' I claim as my invention:

1; A mufiler comprising a casing, an enlarged part uponsaid casing, a fan within said enlargement, a shaft upon which said shaft,'there.beingea conduit intermediate the engine andthe enlarged part of 'said casing,

and a conduitextendilrg'irom' said worm to said enlargement,.said.worm being of. substantially the ca ceived.

the same diameter as that partiof g .which the; worm isxre- 2. A mufiier compfisingaicasing formedleading from the engine-andent'ering-said enlarged part, and aconduit: leading hold the blades 7' gases, therefore, do b shaft being journaled insaid conduit said worm is received.

said enlarged part and adapted to convey the gases from said enlarged part to said worm, said worm being of substantially the same diameter as that part of the casin within which the worm is received.

3. A muffler comprising a casing formed with an enlargement, a fan received within said enlarged part, a worm received within the casing, a shaft upon which both said worm and said fan are secured, a conduit leading from the engine and entering said enlarged part, and a conduit leading from said enlarged part and adapted to convey the gases from said enlarged part to said worm, the cavity' within which said fan moves being larger near the hub than near the outer extremities of the blade of the fan.

.4. A muffler comprising a casing formed with an enlargement, a fan received within said enlarged part, a worm received within the casing, a shaft upon which both-said worm and said fan are secured, a conduit leading from the engine and entering said enlarged part, and a conduit lea ing frbm said enlarged part and adapted to convey the gases from said enlarged part to said worm, said fan being provided with blades which are relatively. wide at or near the hub ut narrower at their extremities.

5. A muffler comprising a hollow casing madein sections, means for securing said sections together, said sections being formed with an enlarged cavity at one end and with a cylindrical cavity, there being a conduit intermediate said cylindrical cavity and the cavity formed by said enlargement, a conduit in connection with said enlargement and adapted to convey the gases from the engine thereinto, a sha a worm thereupon within said cylindrical 'partof said casing, and a fan thereupon wit 'n said'enlargement, said fanhaving blades relatively wide near the hubs and relatively narrow at their extrem ities, and means for supporting said shaft.

6. Amufiier comprising a casing formed with an enlargement, a fan received within said enlarged part, a worm within the easing,'a shaft'u ponwhich both said worm and said fan are secured, a conduit leading from the engine and entering said enlarged part,

, being arranged with its discharge .endobliquely disposed to the axis of said shaft, and a conduit'leading from said enlarged part and connecting said enlarged partto that part of the casing within which 7.5A mufiler comprising a casing formed with an-enlargement, a fan received within said enlarged part, a worm within the casing,ja shaft upon which both saidworin and said fan are secured, a conduit leading from 1 the 'c'ugine and entering said enlarged part,

being arranged with its dissaidconduit charge end obliquely disposed to the axis of In testimony whereof I hereunto aflix my said shaft, and a conduit leading from said signature in the presence of two witnesses.

enlarged part and connecting said enlarged 4 part to that part of the casing within which WILLIAM REETZ' said worm is-received, said fan being pro- Witnesses: vlded wlth blades wh1ch are wider at or near FREDERICK E. GIESDREQHT,

the hub than at their outer extremities. Rom. Known 

